Give 2 ways that exposing non-pathogenic bacteria to antibiotics as a side effect of antibiotic treatment for a pathogen may increase the spread of resistance.

The resistance of the bacteria to antibiotics is increasing and the disease which were easily treatable using the antibiotics, are now incurable and bacteria becomes resistant.  

The overdose and misuse of antibiotics Is a big concern of worry. Every time we use antibiotics, it will kill the bacteria which were sensitive but resistant bacteria will survive and starts growing and this process will increase the growth of the resistant bacteria upon the nest use of the antibiotics.  

Also due to unawareness, the use of antibacterial tablets against viral infections also cause increase in resistance of bacteria against antibiotics.